Răspuns:
c=mdx100/ms
md=12g
m,apa=188g
ms= md+m,apa= 200g
c= 12x100/200=6%
solutia 1
c1=10%
ms1=200g
md1= c1xms1/100= 20g
solutia 2
md2=md1=20g
ms2= ms1+m,apa= 200+50=> 250g
c2= md2x100/ms2= 20x100/250=>8%
prin adaugare de sovent solutia se dilueaza
Explicație:
